Revolutionary Serbia (Serbian: Устаничка Србија / Ustanička Srbija), or Karađorđe's Serbia (Serbian: Карађорђева Србија / Karađorđeva Srbija), refers to the state established by Serbian revolutionaries in Ottoman Serbia (Sanjak of Smederevo) after successful military operations against the Ottoman Empire and the establishment of a government in 1805. The Sublime Porte first officially recognized the state as autonomous in January 1807, however, the Serbian revolutionaries rejected the treaty and continued fighting the Ottomans until 1813. Although the first uprising was crushed, it was followed by the Second Serbian Uprising in 1815, which resulted in the creation of the Principality of Serbia, as it gained semi-independence from the Ottoman Empire in 1817.